vulnerable are the very young and very old and people with underlying illnesses, lung disease, hart disease, diabetes and the like. >> when do you head to the hospital? >> you head to the hospital when you're really fewing terrible and also when your sputum suddenly appears when your cough becomes productive. >> that's the trigger to go seek more help and is that when you would take those anti-virals? >> well actually you take the anti-virals as early as possible, particularly if you have an underlying illness or you're a person of a certain age. it's when you get further complications and you feel just very bad. we want to make sure you haven't got a complicating bacterial pneumonia. >> all right. dr. william schattner. >> my pleasure. >>> now to the recent gun control issue. at the president's request, vice justice correspondent bob yoreorr is in our washington bureau rewith the latest on what may be in the works. good morning. >> good morning, anthony. the white house now feels it has strong public support on its side for tough new gun control measures, but stiff opposition does remain. vice presi